Docking device



FIG. 1 is a top front perspective view of a docking device;

FIG. 2 is a front elevation view thereof;

FIG. 3 is a rear elevation view thereof;

FIG. 4 is a left side elevation view thereof;

FIG. 5 is a right side elevation view thereof;

FIG. 6 is a top elevation view thereof; and,

FIG. 7 is a bottom elevation view thereof.

The broken lines shown represent unclaimed subject matter and form no part of the claimed design. 

CLAIM The ornamental design for a docking device, as shown and described. 